Part A
ACPL-C79B-000E
Broadcom Ltd
- Lifecycle
- Active
- Stock
- 5529 PCS
- Package
- SSO-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The ACPL-C79B-000E and ACPL-C78A-060E are both isolated sigma-delta modulator amplifiers from Broadcom's ACPL-C78x/C79x family, sharing a common SO-8 stretched package, 5 V supply architecture, and differential output topology. The ACPL-C79B-000E offers a higher specified gain tolerance grade (±0.5% vs ±1%) and a wider guaranteed operating temperature range, making it a viable functional upgrade in most isolated current-sensing and motor-drive applications. However, designers must validate the tighter gain specification against system calibration budgets and confirm that the narrower input signal range of the C79B variant does not compromise full-scale measurement headroom in the target design.
Package Type
High match
Output Type
High match
Gain Tolerance
Validation required
Input Signal Range
Validation required
Parts at a glance
Part B
ACPL-C78A-060E
Broadcom Ltd
- Lifecycle
- Active
- Stock
- 4839 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ACPL-C79B-000E | ACPL-C78A-060E | Why it matters |
|---|---|---|---|
| Manufacturer | Broadcom | Broadcom | Same manufacturer ensures consistent quality and support. |
| Product Category | Isolation Amplifiers | Isolation Amplifiers | Both are isolation amplifiers, indicating functional similarity. |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | Higher isolation voltage provides better safety and noise immunity. |
| Gain | 8.2 | 8.2 | Gain determines signal amplification factor for accurate measurement. |
| Bandwidth | 200 kHz | 100 kHz | Higher bandwidth allows faster signal response and better dynamic performance. |
| Input Offset Voltage | 0.5 mV | 1.5 mV | Lower offset voltage improves measurement accuracy. |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Compatible supply voltage ensures easy integration into existing designs. |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | Wide temperature range supports industrial and automotive applications. |
| Package / Case | SO-8 | SO-8 | Same package allows direct drop-in replacement on PCB. |
| Isolation Type | Optical | Optical | Optical isolation provides galvanic isolation and high noise immunity. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ACPL-C79B-000E | ACPL-C78A-060E |
|---|---|---|
| Supplier | - | Broadcom Limited |
| Part Status | Active | Active |
| Amplifier Type | Isolation | Isolation |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| -3 dB Bandwidth | 200 kHz | 100 kHz |
| Voltage - Input Offset | 600 µV | 300 µV |
| Supply Current | 13mA | 11mA |
| Current - Output / Channel | 11 mA | 18.6 mA |
| Voltage - Supply Span(Min) | 4.5 V | 4.5 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Current - Input Bias | 100 nA | - |
Frequently asked questions
What are the ACPL-C79B-000E and ACPL-C78A-060E?
Both are Broadcom isolation amplifiers in the ACPL-C79x/C78x family. The ACPL-C79B-000E is a precision optically isolated amplifier with ±0.5% gain tolerance and 200 kHz bandwidth. The ACPL-C78A-060E is a lower-grade version with ±1% gain tolerance and 100 kHz bandwidth. Both use sigma-delta modulation and are packaged in a 5-pin SO-8 stretched package.
What is the key difference between the ACPL-C79B-000E and ACPL-C78A-060E?
The main differences are gain tolerance and bandwidth. The ACPL-C79B-000E offers ±0.5% gain tolerance and 200 kHz bandwidth, while the ACPL-C78A-060E offers ±1% gain tolerance and 100 kHz bandwidth. The ACPL-C79B-000E also has a lower offset voltage and higher common-mode transient immunity compared to the ACPL-C78A-060E.
Are the ACPL-C79B-000E and ACPL-C78A-060E pin-to-pin compatible?
Yes, both devices are offered in the same 5-pin SO-8 stretched package with identical pinout. However, direct substitution requires verifying that the system performance requirements are met by the replacement part, especially regarding gain error, bandwidth, and offset specifications.
What is the isolation voltage rating for these components?
Both the ACPL-C79B-000E and ACPL-C78A-060E are rated for 5000 Vrms isolation for 1 minute per UL 1577. They also carry IEC/EN/DIN EN 60747-5-5 approval with a working voltage of 891 Vpeak and a transient overvoltage of 6000 Vpeak.
What are the typical applications for the ACPL-C79B-000E and ACPL-C78A-060E?
These isolation amplifiers are used in motor phase current sensing, inverter current sensing, and general-purpose current and voltage sensing in industrial and automotive applications. The ACPL-C79B-000E is preferred for higher-precision applications, while the ACPL-C78A-060E suits cost-sensitive designs with lower bandwidth requirements.
What is the operating temperature range for these isolation amplifiers?
Both the ACPL-C79B-000E and ACPL-C78A-060E are specified for an operating temperature range of –40°C to +105°C. This range is consistent across the ACPL-C79x and ACPL-C78x families.
Can the ACPL-C78A-060E be used as a drop-in replacement for the ACPL-C79B-000E?
No, it is not a direct drop-in replacement. Although the package and pinout are identical, the ACPL-C78A-060E has wider gain tolerance (±1% vs ±0.5%), lower bandwidth (100 kHz vs 200 kHz), and higher offset voltage. The system must be re-evaluated to ensure these degraded specifications do not violate design requirements.
What is the gain error specification for each part?
The ACPL-C79B-000E has a gain error of ±0.5% at 25°C. The ACPL-C78A-060E has a gain error of ±1% at 25°C. Both specifications are typical values and are subject to the conditions stated in the respective Broadcom datasheets.
Do these components require external components for operation?
Yes, both the ACPL-C79B-000E and ACPL-C78A-060E require external components for proper operation. A typical application circuit includes a shunt resistor for current sensing, a decoupling capacitor on the supply pins, and an RC filter on the output. The manufacturer datasheets provide recommended external component values and layout guidelines.